Using this large cohort of children, the researchers showed that children who were obese at 5 years old had a 75 percent likelihood of remaining obese when they were 12 years old. Most crucially, children with severe obesity at 5 years old, had almost 20 times the subsequent risk of developing SCFE than a lower weight child. The greater the BMI of the child, the greater the risk of SCFE. Study authors said surgeons have long believed obesity may be responsible for SCFE, though there was no substantial proof until now.

It is important that doctors who treat children are aware of SCFE, they said, especially among children with obesity. While children with SCFE identified early typically only need relatively simple surgery, the authors said, SCFE is one of the most common reasons for hip replacement in young adults, and sometimes even children.